<template>
  <div>
    <transition name="move">
      <div v-show="showFlag" class="food" ref="food">
        <div class="food-content">
          <div class="image-header">
            <img :src="food.image" alt />
            <div class="back" @click="hide">
              <i class="icon-arrow_lift"></i>
            </div>
          </div>
          <div class="content">
            <h1 class="title">{{food.name}}</h1>
            <div class="detail">
              <span class="sell-count">月售{{food.sellCount}}份</span>
              <span class="rating">好评率{{food.rating}}%</span>
            </div>
            <div class="price">
              <span class="now">￥{{food.price}}</span>
              <span class="old" v-show="food.oldPrice">￥{{food.oldPrice}}</span>
            </div>
            <div class="cartcontrol-wrapper">
              <cartcontrol :food="food"></cartcontrol>
            </div>
            <div class="buy" v-show="!food.count||food.count===0" @click.stop="addFirst">加入购物车</div>
          </div>
          <split v-show="food.info"></split>
          <div class="info" v-show="food.info">
            <h1 class="title">商品信息</h1>
            <p class="text">{{food.info}}</p>
          </div>
          <split></split>
          <div class="rating">
            <div class="title">商品评价</div>
            <ratingselect
              :selectType="selectType"
              :onlyContent="onlyContent"
              :desc="desc"
              :ratings="food.ratings"
            ></ratingselect>
            <div class="rating-wrapper">
              <ul v-show="food.ratings && food.ratings.length">
                <li
                  v-show="needShow(rating.rateType,rating.text)"
                  v-for="rating in food.ratings"
                  class="rating-item border-1px"
                >
                  <div class="user">
                    <span class="name">{{rating.username}}</span>
                    <img :src="rating.avatar" alt class="avatar" width="12" height="12" />
                  </div>
                  <!-- 格式化日期 -->
                  <div class="time">{{rating.rateTime | formatDate}}</div>
                  <p class="text">
                    <span
                      :class="{'icon-thumb_up':rating.rateType===0,'icon-thumb_down':rating.rateType===1}"
                    ></span>
                    {{rating.text}}
                  </p>
                </li>
              </ul>
              <div class="no-rating" v-show="!food.ratings||!food.ratings.length">暂无评论</div>
            </div>
          </div>
        </div>
      </div>
    </transition>
  </div>
</template>

<script>
import Vue from "vue";
import BScroll from "better-scroll";
// +-号
import cartcontrol from "../cartcontrol/cartcontrol";
// 灰色的杠
import split from "../split/split";
// 评价的内容
import ratingselect from "../ratingselect/ratingselect";
import { formatDate } from "../../common/js/date";

// 选项卡的三种状态 好评差评那些
const POSITIVE = 0;
const NEGATIVE = 1;
const ALL = 2;

export default {
  data() {
    return {
      showFlag: false,
      selectType: ALL,
      //决定选中是否显示只有评论
      onlyContent: false,
      desc: {
        all: "全部",
        positive: "推荐",
        negative: "吐槽",
      },
    };
  },
  components: {
    cartcontrol,
    split,
    ratingselect,
  },
  props: {
    food: {
      type: Object,
    },
  },
  methods: {
    //显示商品详情页
    show() {
      this.showFlag = true;
      this.selectType = ALL;
      this.onlyContent = false;
      this.$nextTick(() => {
        if (!this.scroll) {
          this.scroll = new BScroll(this.$refs.food, {
            click: true,
          });
        } else {
          this.scroll.refresh();
        }
      });
    },
    hide() {
      this.showFlag = false;
    },
    //加入购物车按钮
    addFirst(e) {
      if (!e._constructed) {
        return;
      }
      this.$root.$emit("cart.add", event.target);
      Vue.set(this.food, "count", 1);
    },

    needShow(type, text) {
      if (this.onlyContent && !text) {
        return false;
      }
      if (this.selectType === ALL) {
        return true;
      } else {
        return type === this.selectType;
      }
    },
  },
  created() {
    // 监听子组件的事件，改变商品评价类型
    this.$root.$on("selectTypeChange", (type) => {
      this.selectType = type;
    });
    // 监听子组件的事件，来回切换只读有内容的评论
    this.$root.$on("onlyContentChange", (onlyContent) => {
      this.onlyContent = onlyContent;
    });
  },

  filters: {
    // 将时间戳转换为正常的时间
    formatDate(time) {
      let date = new Date(time);
      return formatDate(date, "yyyy-MM-dd hh:mm");
    },
  },
};
</script>

<style lang="stylus" rel="stylesheet/stylus" scoped>
@import '../../common/stylus/mixins.styl';

.food {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 48px;
  z-index: 30;
  width: 100%;
  background-color: #fff;

  &.move-enter, &.move-leave-to {
    transform: translate3d(100%, 0, 0);
  }

  &.move-enter-active, &.move-leave-active {
    transition: all 0.3s linear;
  }

  .image-header {
    position: relative;
    width: 100%;
    height: 0;
    // padding如果使百分数就是按宽度计算的
    padding-top: 100%;

    img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
    }

    .back {
      position: absolute;
      top: 10px;
      left: 0;

      .icon-arrow_lift {
        display: block;
        padding: 10px;
        font-size: 20px;
        color: white;
      }
    }
  }

  .content {
    position: relative;
    padding: 18px;

    .title {
      line-height: 14px;
      margin-bottom: 8px;
      font-size: 14px;
      font-weight: 700;
      color: rgb(7, 17, 27);
    }

    .detail {
      margin-bottom: 18px;
      line-height: 10px;
      height: 10px;
      font-size: 0;

      .sell-count, .rating {
        font-size: 10px;
        color: rgb(147, 153, 159);
      }

      .sell-count {
        margin-right: 12px;
      }
    }

    .price {
      font-weight: 700;
      line-height: 24px;

      .now {
        margin-right: 4px;
        font-size: 14px;
        color: rgb(240, 20, 20);
      }

      .old {
        text-decoration: line-through;
        font-size: 10px;
        color: rgb(147, 153, 159);
      }
    }

    .cartcontrol-wrapper {
      position: absolute;
      right: 12px;
      bottom: 12px;
    }

    .buy {
      position: absolute;
      right: 18px;
      bottom: 18px;
      z-index: 10;
      height: 24px;
      line-height: 24px;
      padding: 0 12px;
      box-sizing: border-box;
      font-size: 10px;
      border-radius: 12px;
      color: #fff;
      background-color: rgb(0, 160, 220);
    }
  }

  .info {
    padding: 18px;

    .title {
      line-height: 14px;
      margin-bottom: 6px;
      font-size: 14px;
      color: rgb(7, 17, 27);
    }

    .text {
      line-height: 24px;
      padding: 0 8px;
      font-size: 12px;
      color: rgb(77, 85, 93);
    }
  }

  .rating {
    padding-top: 18px;

    .title {
      line-height: 16px;
      margin-left: 18px;
      font-size: 14px;
      color: rgb(7, 17, 27);
    }

    .rating-wrapper {
      padding: 0 18px;

      .rating-item {
        position: relative;
        padding: 16px 0;
        border-1px(rgba(7, 17, 27, 0.1));

        .user {
          position: absolute;
          right: 0;
          top: 16px;
          line-height: 12px;
          font-size: 0;

          .name {
            display: inline-block;
            margin-right: 6px;
            vertical-align: top;
            font-size: 10px;
            color: rgb(147, 153, 159);
          }

          .avatar {
            border-radius: 50%;
          }
        }

        .time {
          margin-bottom: 6px;
          line-height: 12px;
          font-size: 10px;
          color: rgb(147, 153, 159);
        }

        .text {
          line-height: 16px;
          font-size: 12px;
          color: rgb(7, 17, 27);

          .icon-thumb_up, .icon-thumb_down {
            line-height: 16px;
            margin-right: 4px;
            font-size: 12px;
          }

          .icon-thumb_up {
            color: rgb(0, 160, 220);
          }

          .icon-thumb_down {
            color: rgb(147, 153, 159);
          }
        }
      }

      .no-rating {
        padding: 16px 0;
        font-size: 12px;
        color: rgb(147, 153, 159);
      }
    }
  }
}
</style>
